Possible Clues:

• Totter
• More like a buck it takes to make one unsteady
• Surprise gangster somehow forgetting name initially
• One horse among the rest may buck Reginald up
• Teeter
• Will a horse stumble among the rest?
• Good actor's ringing pitch
• Walk unsteadily, from weakness or drink
• Knock one's socks off
• Arrange alternately